It depends on the Number you dialling..
Assume that your toll free number is 8000120001 and you use 9 as PSTN dialling prefix in that case the RP will be as mention below.
It can be exact match as below
98000120001
Or using wild mask
98.........
You’ll have to provide a little more details on this to get any specific answer. For starters what country are you asking about?
